The file is now copied in the build process, but, sadly, not compiled !!!!

But, my own folders in the resources personal folders ARE NOT COPIED WHEN BUILDING, so now, in build/resources/css folder there is no "images" folder which contains my own images used in my application...

But this do not resolve the "absolute url" for some of the images used in my application !

PARTIALY RESOLVED

Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/form/exclamation.gif
Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/form/text-bg.gif
Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/form/trigger.gif
Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/form/date-trigger.gif
Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/form/spinner.gif
Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/button/s-arrow.gif
Failed to load resource: the server responded with a status of 404 (Not Found)
http://xx.xx.xx.xx:yy/Users/tag-all/Workspace/www/project/lib/ext/resources/themes/images/default/grid/grid3-hd-btn.gif

ps : so good to be my own personnal Sencha Team answerer ;-) maybe i'll burn out my tickets for this kind of "mysterious things" !!